allen



(No Model.)

J. H. ALLEN. NUT LOCK.

No. 435,786. Patented Sept. 2, 1890.

auoewbm Q mtmseeo album NITED STATES PATENT OFFICE.

JOHN II. ALLEN, OF KEYSER, EST VIRGINIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 435,786, dated September 2, 1890.

Application filed April 23, 1890. Serial No. 349,087. (No model.)

To all whom it may concern.-

Be it known that I, JOHN H. ALLEN, a citizen of the United Statesof America, residing at Keyser, in the county of Mineral and State of West Virginia, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object certain new and useful improvements in nut-locks; and it consists in the novel construction and combination of the parts, as hereinafter more fully described, and shown in the accompanying drawings, in which- Figure 1 is a side elevation of my improved nut-lock. Fig. 2 is a front elevation thereof; and Fig. 3 is a sectional elevation of my invention, parts being broken away.

In carrying out my invention I employ a bolt A, having therein vertical orifices a a for reception of pin a, the purpose of which will be described hereinafter.

In the application of my nut-lock nut B, being screwed upon the bolt-lock D, is then thereon secured, its inner side abutting against the outside of the nut or its washer I) inserted between them, said washer being of suflicient thickness to bring the serrated edge of lock D near one of the orifices a a. The inner end 12 of lock D is octagonal or shaped like a nut, thus allowing it to be readily turned by means of a wrench, and has a shoulder (1 formed near its front edges to make it of uniform thickness. The front edge of lock 01 is divided into two semicircular inclined serrated edges (1 (1 between the teeth of which the two projecting ends of pin a projects in practice. Thus constructed and arranged, in looking the nut, the pressure is increased on nut B by pin a as it advances up the inclined serrated edges of the lock D. \Vhen it is desired to release the nut, it is readily accomplished by withdrawing pin 0. from orifices a a, thus allowing the nut and lock to be turned backward.

In Fig. 3 the lock is shown to be internally screw-threaded. This construction I do not confine myself to, as a great deal of time and expense may be saved by having a smooth inner periphery, thus allowing the lock to slide on the bolt A, with the same result being accomplished by either construction of the lock. Thus constructed a very eificient, inexpensive, and novel nut-lock is produced, which may be readily attached to any ordinary bolt, and thus constructed springs or delicate parts liable to be broken are avoided.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

In a nut-lock, the lock having a shoulder thereon near. its rear end and having its forward face divided into two semicircular inclined serrated edges, the said serrations being engaged by a pin or key inserted through an orifice in the nut or bolt, substantially as shown and described.

In testimony whereof I alflx my signature in presence of two witnesses.

JOHN H. ALLEN.

Witnesses:

S. L. BERKEBILE, Titos. M. NEALE. 

